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Open Roads Forum  >  Tech Issues

 > 15/30/50 SHORE POWER PLUG IN ?

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time2roll

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Posted: 07/26/19 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

If the 50 amp outlet is a standard NEMA 14-50 then you can use a standard 50-30 RV adapter.
Look for the "NEMA 14-50" right on the face of it.

Otherwise do not force anything in or the magic smoke comes out.


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Dutch_12078

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Posted: 07/26/19 08:00pm Link  |  Quote  |  Print  |  Notify Moderator

rk911 wrote:

fj12ryder wrote:

Just get a 50 amp to 30 amp adapter. You plug your 50 amp plug into it and then into the 30 amp pedestal. Easy peasy.

and no, a 50-amp RV pedestal is not 220-volts. it is two separate legs of 120-volts, each leg capable of supplying 50-amps. you can safely connect your 30-amp RV to the 50-amp RV pedestal using the 30-female/50-male dogbone adapter


Maybe you should take a look at the next RV park pedestal you see with a 50 amp outlet. Notice that it has "120/240V" embossed or molded on it. Newer outlets may have "125/250V" on them. You may even notice that it's exactly the same NEMA 14-50 format that 120/240 volt residential ranges plug into. There is nothing special about the outlet or how it's wired for RV use compared to normal residential use.


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DSteiner51

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Posted: 07/28/19 12:41pm Link  |  Quote  |  Print  |  Notify Moderator

rk911 wrote:

fj12ryder wrote:

Just get a 50 amp to 30 amp adapter. You plug your 50 amp plug into it and then into the 30 amp pedestal. Easy peasy.

and no, a 50-amp RV pedestal is not 220-volts. it is two separate legs of 120-volts, each leg capable of supplying 50-amps. you can safely connect your 30-amp RV to the 50-amp RV pedestal using the 30-female/50-male dogbone adapter


My house has 2 120 volt wires come into my main breaker box and a double 200 amp breaker. Farther down are several double breakers, 1 for the dryer, 1 for the range, 1 for the well pump, and 1 for my 5th wheel. In my 5th wheel the main breaker is again a 50 amp double breaker. If in fact my house is 240 volts and my dryer, range, and well pump, then my 5th wheel is also 240 volts. When I use a volt meter and jump between my two hot bars in my RV it reads 240 volts. Horrors!


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Posted: 07/28/19 12:50pm Link  |  Quote  |  Print  |  Notify Moderator

DSteiner51 wrote:

rk911 wrote:

fj12ryder wrote:

Just get a 50 amp to 30 amp adapter. You plug your 50 amp plug into it and then into the 30 amp pedestal. Easy peasy.

and no, a 50-amp RV pedestal is not 220-volts. it is two separate legs of 120-volts, each leg capable of supplying 50-amps. you can safely connect your 30-amp RV to the 50-amp RV pedestal using the 30-female/50-male dogbone adapter


My house has 2 120 volt wires come into my main breaker box and a double 200 amp breaker. Farther down are several double breakers, 1 for the dryer, 1 for the range, 1 for the well pump, and 1 for my 5th wheel. In my 5th wheel the main breaker is again a 50 amp double breaker. If in fact my house is 240 volts and my dryer, range, and well pump, then my 5th wheel is also 240 volts. When I use a volt meter and jump between my two hot bars in my RV it reads 240 volts. Horrors!
So if I'm reading this right, if I plugged my RV into the dryer outlet, if it fit of course, no harm would come to my RV because they're both 240 volts? Correct?


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rk911

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Posted: 07/28/19 12:57pm Link  |  Quote  |  Print  |  Notify Moderator

[emoticon]


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Posted: 07/28/19 06:50pm Link  |  Quote  |  Print  |  Notify Moderator

As a mechanical engineer, I don't deal well in imaginary numbers...

Are RV pedestal 50a circuits single phase or two phase?

vermilye

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Posted: 07/29/19 08:21am Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:

As a mechanical engineer, I don't deal well in imaginary numbers...

Are RV pedestal 50a circuits single phase or two phase?
Single phase 120/240V


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Posted: 07/29/19 08:44am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

So if I'm reading this right, if I plugged my RV into the dryer outlet, if it fit of course, no harm would come to my RV because they're both 240 volts? Correct?


Your RV is wired for 120 vac main service, NOT 240 vac. What do you think will happen if you plug your 120 vac trailer into 240 vac source power? [emoticon]

wnjj

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Posted: 07/29/19 10:20am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

So if I'm reading this right, if I plugged my RV into the dryer outlet, if it fit of course, no harm would come to my RV because they're both 240 volts? Correct?

If your dryer outlet has 4 wires to include a neutral, your RV plug has 4 pins and the plug fits, you are correct.

The trouble starts when people plug 30A 3-pin RV’s into 240V 3-pin dryer outlets.

time2roll

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Posted: 07/29/19 10:52am Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:

As a mechanical engineer, I don't deal well in imaginary numbers...

Are RV pedestal 50a circuits single phase or two phase?
I think the common term is split phase since you can use either the 240v between the hots or 120v from hot to neutral. Although single phase would be correct based on the single coil source. Some call it two phase since the two hots are 180 out of phase from each other. Definitely not three phase.

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